Utilization of scrap metal in the manufacture of washers.



I, F. GULDING.

UTILIZATION OF SCRAP METAL IN THE MANUFACTURE OF WASHERS. APPLICATION FILED NOV. 16, I915.

1 210 928, Iutvnted Jan. 2, 1917.

5141mm for c'l Hume JOHN F. GOLDIIIG, OT? VIASHINGTJN, DISTEIGT GL fiOLUMBKA.

UTILIZATIQN OF Sfifli? METAL IN THE T-IIABETFACEURE 0 WASTE-i Specification of Letters Patent.

Application filed llcvcmber 16, 1915. Serial. No. 61,7G5.

1'0 all whom it may (Ono/39% Be it known that I, Jenn F. citizen of the United States, Washington, in the District of Columbia, have invented certain new and useful improvements in the Utilization of Scrap Metal in the Manufacture of l i ashers, of which-the following is a specification.

My invention relates to the utilization of a certain class of scrap metal for the production of washers.

There is a large quantity of disk like scrap metal resulting from punching holes in plates, sheets or other forms of rolled metal. Heretot'ore such disk like punchings Genome, a residing at have had no commercial value above that of scrap metal such as is used for remelting.

Washers have heretofore been produce by punching them of desired diameter from plates or sheets of metal which. have been previously rolled to the thickness required for the washer. The practice of the old method results in the production of a large amount of perforated scrap sheet metal timated at about 80% of the total sh ct), of low scrap value due to its being bulky and inconvenient for remelting. Such is not the case however in the practice of my method,

there being no scrap produced excepting the small central disk resulting from perforatingthe pressed washer, and these punchings are of as great a value per pound weight as the original punchings from washers are made. There is therefore great economy effected by my process of producing washers.

The steps taken in the manufacture of washers by my method are as follows: I take the said punchings and reduce them by pressure to the thickness and diameter required for the washers. This pressing op eration may be performed upon the scrap disks either when they are cold or after they have hccnheated. Thereafter there is ordinarily nothing further to be done but punch the aperture in the washer. if desired the washer may in some cases trimmed circumfcrcntialiy at the same oporation.

There may be some irregularities in the scrap disks in respect of burs, fins or projections along and around their edges, pro-- ducod by the punching operation, and preferably the disks are preliminarily tumbled to take away said burs, so that the disks will lie evenly on the anvil of the pressing machine and washers properly finished around the periphery will be produced. In some cases the washers, after they have been perforated, may also he tumbled to take away any sharp edges that may result from such punching and trimming.

In order to make the invention more clearly understood 1 have shown in the ac coiupanying drawings means for carrying the same into practical effect, without limiting the improvements, in their useful applintions, to the particular construction which, for the purpose of cxamp c, has been made the subject of illustration.

in drawiugs-Figure 1 is a perspective View of a scrap disk punching suitable for use in carrying my invention into effect. 1*" 1) is a side view, in the nature of a diagram, illustrating the pressing apparatus and operation. Fig". 3 is a perspective View of the washer blank after the pressing oporation. i is a perspective view of the finished washer.

Referring to the drawings, 1 indicates the metal scrap disk punching.

2 indicates the anvil and 8 the hammer, plunger or movable part of the pressing apparatus. ldy this apparatus the disk 1 is reduced to the proper ctcr, indicated by dotted lines in 2.

l imhcates the reduced washer blank, and 5 the finishml washer after it has been perforated with the hole The pressing operation expands the scrap disk radially to the diameter required as well as reduces the same to the desired thickness. This o 'icration also rounds the blank 4. at it; periphery. in a direction from one face to the other of the blank as shown at 7. For many classes of washers this configuration or" the edge is desirable, and is produced by the pressing operation without the expense of any further procedure.

When washers are punched out from a flat she-ck of rolled metal. according to the usual method of manufacture, the action of tuc punching dies up strains in the metal or the washers so that they are sometimes distorted or warped out of shape and are not perfectly flat. But according to my invention washer blank is produced periectly true and plane on both. surfaces and thickness and diam- The herein described process of utilizing solld and imperforate scrap disk punchings,' d

of the punch-sheared form which they normally assume in being punched from metal notion of metal washers,

plate, for the prod which consists in reducing such individual solid punchings by axial pressure between opposing continuous die surfaces and causing all the metal therein, excepting that at the immediate center of the disk, to flow under such pressure radially, freely and uniformly outward in'all directions so that the isk is expanded until the desired diameter of the washer has been attained and the same has been duly flattened, and then perforating such reduced disks.

In testimony whereof I affix my signature.

JOHN F. GOLDING. 

